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I use Wafflepool on X11 and buy Cloak manually with the results. The brief period when they were doing X13 was very profitable (peaked at >600% of LTC) but suitable candidate launches seem to have dried up and it's no longer offered. In terms of profitability, the value of coins mined is barely more than the price of electricity so, at a small scale, it's only worth doing with existing equipment on the basis of future growth rather than current value.